Review
Energy & Fuels
Eliane Barros, Paulo R. Filgueiras, Valdemar Lacerda Jr, Ryan P. Rodgers, Wanderson Romao
Summary: This article introduces the definition, formation mechanisms, and classification of naphthenic acids (NAs), as well as the challenges and phenomena related to the petrochemical industry. A bibliometric review shows an increase in the number of publications about NAs in recent years. The article also presents the primary extraction and characterization techniques of NAs, with Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) being an excellent characterization method.
Article
Energy & Fuels
Mohammad Fattahi Mehraban, Seyed Amir Farzaneh, Mehran Sohrabi
Summary: This study investigates the effect of salinity on oil/water interfacial interactions and identifies that low salinity water injection promotes the formation of water microdispersion at the oil/water interface.
Article
Energy & Fuels
Sharath Chandra Mahavadi, Mohammed Al Hamad, Shouxiang Mark Ma, Wael Abdallah
Summary: Interfacial tension (IFT) between crude oil and water is a critical property that affects multiphase flow in porous media. Measuring IFT in the laboratory is challenging, and tools for downhole measurement are currently unavailable. Existing reservoir simulators rely on empirical models that do not accurately account for crude oil chemistry. This study developed a potential model for downhole IFT measurement using crude oil samples from different fields. The model can improve saturation height function modeling, aid in field development planning and production strategies, and serve as a monitoring tool to prevent technical issues.
Article
Energy & Fuels
Madjid Meriem-Benziane, Benyebka Bou-Said, Bassam Gamal Nasser Muthanna, Ismail Boudissa
Summary: Corrosion damage at the elbows in the piping system during crude oil refining process is influenced by sodium chloride, calcium chloride, naphthenic acids, and sulfur compounds. Computational fluid dynamics helps predict corrosion behavior and offers solutions to improve operational safety.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Juan S. Ramirez-Pradilla, Cristian Blanco-Tirado, Marie Hubert-Roux, Pierre Giusti, Carlos Afonso, Marianny Y. Combariza
Summary: In this study, the performance of APPI, LDI, and ET-MALDI for analyzing PP-enriched extracts was compared. ET-MALDI produced a less complex spectrum with fewer ions, leading to improved signal resolution and mass accuracy in FT-ICR-MS.
Article
Chemistry, Multidisciplinary
Jiangbo Wen, Haijun Luo, Gang Ai
Summary: The study found that the emulsified water fraction is related to the physicochemical properties of crude oil and can be conveniently predicted with a prediction model for different crude oils and shearing conditions. The model prediction has a mean relative deviation of 4.5%.
Article
Energy & Fuels
Guillaume Lemahieu, Johann Le Maitre, Charlotte Mase, Julien Maillard, Jesus F. Ontiveros, Leticia Ligiero, Matthieu Loriau, Pierre Giusti, Carlos Afonso, Jean-Marie Aubry, Valerie Molinier
Summary: A novel method for extracting crude oil surface-active species using three-phase microemulsions has been described, demonstrating effectiveness compared to the established wet-silica method. Analytical data suggests a correlation between the interfacial materials and the interfacial activity, stability, and equivalent alkane carbon numbers of the crude oil.
Article
Energy & Fuels
Amit Patil, Kamilla Arnesen, Anja Holte, Umer Farooq, Anders Brunsvik, Trond Storseth, Stein Tore Johansen
Summary: Crude oils exhibit complex dispersion and emulsion flow behavior with water due to their rich chemical composition. The interfacial properties and surface chemistry of oil and water heavily influence the stability and separation, a new technique involving stirred tank cell with interfacial tension and analytical chemistry measurement is proposed for better understanding. Droplet stability parameters and surface-active components in crude oils play a significant role in emulsion droplet stability.
Article
Energy & Fuels
Qian-Hui Zhao, Shuai Ma, Jian-Xun Wu, Wei-Feng Chang, Sheng-Fei Zhang, Xin-Ge Sun, Bing Zhou, Zeng-Min Lun, Keng H. Chung, Quan Shi
Summary: Most heavy crude oils undergo degradation and produce naphthenic acids, which are polar compounds that affect oil viscosity. The relationship between the molecular composition of naphthenic acids and oil viscosity is not well understood. This study analyzed a clean heavy oil with low heteroatom content but high naphthenic acid content. It was found that naphthenic acids with 2-3 rings and 15-35 carbon atoms are the dominant components, and the viscosity of the distillation fraction increases exponentially with boiling point.
Review
Energy & Fuels
Da Huo, Jianxun Wu, Han Li, Haiyan Huang, Keng H. Chung, Quan Shi
Summary: Calcium in crude oil can cause equipment fouling and catalyst deactivation, and its speciation in crude oil is of interest to the petroleum industry. This review summarizes the various forms of calcium found in crude oils, including inorganic and organic compounds. The progress in characterization methods and molecular composition of organic insoluble calcium-containing compounds is highlighted.
PETROLEUM SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Harry Collini, Matthew D. Jackson
Summary: Despite the wide range of interest and applications, the controls on surface charge of crude oil in aqueous solution are not well understood. This study collates and reviews previous measurements of zeta potential on crude oil, compares and contrasts the results, and reports new measurements of zeta potential on crude oil wetting films and layers. The results show that the zeta potential depends on electrolyte pH and the concentration of divalent ions Ca2+ and Mg2+. Lower pH and higher concentration of these divalent ions lead to more positive zeta potential. The findings have important implications for engineering and industrial activities involving crude oil.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2023)
Article
Environmental Sciences
Kirk T. O'Reilly, Natasha Sihota, Rachel E. Mohler, Dawn A. Zemo, Sungwoo Ahn, Renae Magaw, Catalina Espino Devine
Summary: The study of oxygen-containing organic compounds in groundwater and surrounding environments at a crude oil release site suggests that these compounds are likely not products of petroleum degradation, but rather microbial products generated through de novo synthesis on carbon sources supplied by the oil. These results have important implications for understanding the fate and managing the risk of hydrocarbons in the subsurface.
JOURNAL OF CONTAMINANT HYDROLOGY
(2021)
Article
Environmental Sciences
Jhonattas Carvalho Carregosa, Julian Eduardo Ballen Castiblanco, Tarcisio Martins Santos, Paloma Santana Prata, Jandyson Machado Santos, Alberto Wisniewski Jr
Summary: This study investigates the changes in the chemical compositions of oils after spill events, focusing on the early stages of weathering. It finds that the marine environment has less oxidative effects compared to the riverine environment on the chemical compositions of crude oils. The results also show the evaporation process during the first 72 hours after oil release, with the disappearance of certain compounds and changes in weathering indexes and organic compound ratios.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Energy & Fuels
Jose G. Delgado-Linares, Marshall A. Pickarts, Luis E. Zerpa, Carolyn A. Koh
Summary: Gas hydrates are a significant issue in oil and gas transportation as they can block flowlines and reduce hydrocarbon production. To mitigate this, surfactant-like molecules are used to prevent the agglomeration of hydrate particles. Some crude oils naturally have anti-agglomeration properties due to the presence of surfactants. Understanding the concentration and interfacial activity of these natural surfactants is crucial in understanding the anti-agglomeration process.
Article
Energy & Fuels
Maria Bonto, Ali A. Eftekhari, Hamidreza M. Nick
Summary: This article discusses the adsorption of polar organic molecules on the surface of brine-saturated carbonate rocks and its impact on oil production and groundwater remediation. The researchers propose a mathematical model to study the adsorption process and validate the model using experimental data. The results indicate that the commonly reported total acid number is insufficient for accurately describing the concentration of organic acids and their affinity toward the rock surface, highlighting the need for more sophisticated analytical methods.
